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11 <br /> tech Analytical Labs,Inc. 525 Del Rey Avenue,Suite E <br /> Sunnyvale,CA 94085 <br /> QUALITY CONTROL RESULTS SUMMARY <br /> ' METHOD: Gas Chromatography <br /> Laboratory Control Sample <br /> QC Batch#: SGC1000710 Date Analyzed: 07/10/00 <br /> ' Matrix: Soil Quality Control Sample: Blank Spike <br /> Units: 4919 <br /> PARAMETER Method a MB SA SR SP € 5P SPD SPD RPD QC LIMITS <br /> µgig µgkg ug/kg % R lag/kg %R 1 RPO l %R <br /> :Benzene 8020 <5.0 4.5 ND 4.6 102 4.4 98 3.5 25 70-130 <br /> ;Toluene 8020 <5.0 27.0 1 ND 26 98 ; 28 102 4.3 25 70-130 <br /> ' ;Ethyl Benzene 8020 <5.0 5.5 ND 5.3 96 5.5 99 3.8 25 70-130 <br /> ;Xylenes 8020 <5.0 33.0 ND 29 89 30 92 3.8 25 ; 70-130 <br /> ;Gasoline 8015 <1000 471 ND 445 94 458 97 2.8 25 ; 75-125 <br /> 1 aaa-TFT(S.S.)-PID 8020 114% 106% 960,'0 65-135 <br /> !aaa-TFT(SS.)-FID 8015 105% 106% 103% 65-135 <br /> �finition of Terms: <br /> na: Not Analyzed in QC batch <br /> MB: Method Blank <br /> SA: Spike Added <br /> SR: Sample Result <br /> RPD(%): Duplicate Analysis- Relative Percent Difference <br /> SP: Spike Result <br /> SP(%R): Spike%Recovery <br /> SPD: Spike Duplicate Result <br /> ' SPD(%R): Spike% Recovery <br /> NC: Not Calculated <br /> 1. <br />